How to acces bulb in headlights in a 1947 TC

As the subject says I need to take a picture of the bulb base of a headlight in a 1947 MG TC.
LBCC sells a LED replacement bulb and I have to make sure of the bulb base.
The headlamps are in very nice shape and have not been apart for more than 20 years and I do not want to scratch anything.
How do I remove surround and glass to access the bulb?
Thanks.